Question

以下正则表达式适用于PCRE，Java和.NET，但不适用于Python或Golang。任何线索如何涵盖最后两个将非常感激。最好有一个正则表达式适合所有人，但我怀疑需要两个或更多。

^(?<VersionTripple>(?<Major>0|[1-9][0-9]*)\.(?<Minor>0|[1-9][0-9]*)\.(?<Patch>0|[1-9][0-9]*)){1}(?<Tags>(?:\-(?<Prerelease>(?:(?=[0]{1}[0-9A-Za-z-]{0})(?:[0]{1})|(?=[1-9]{1}[0-9]*[A-Za-z]{0})(?:[0-9]+)|(?=[0-9]*[A-Za-z-]+[0-9A-Za-z-]*)(?:[0-9A-Za-z-]+)){1}(?:\.(?=[0]{1}[0-9A-Za-z-]{0})(?:[0]{1})|\.(?=[1-9]{1}[0-9]*[A-Za-z]{0})(?:[0-9]+)|\.(?=[0-9]*[A-Za-z-]+[0-9A-Za-z-]*)(?:[0-9A-Za-z-]+))*){1}){0,1}(?:\+(?<Meta>(?:[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))){0,1})$

扩展了一些评论：

^
(?<VersionTripple>
    (?# Version fields are either zero or numeric with no leading zeros.)
    (?<Major>0|[1-9][0-9]*)
    \.
    (?<Minor>0|[1-9][0-9]*)
    \.
    (?<Patch>0|[1-9][0-9]*)
){1}
(?<Tags>
    (?# Either a prerelease tag or a prerelease tag followed by a build meta tag.)
    (?:
        (?# Prelease tags are preceded by a single dash and have one or more dot seperated identifiers.)
        \-
        (?<Prerelease>
            (?:
                (?# Look ahead, is it just zero? Then claim a zero.)
                (?=[0]{1}[0-9A-Za-z-]{0})(?:[0]{1})
                |
                (?# Look ahead, is it pure numeric? Then claim the digits.)
                (?=[1-9]{1}[0-9]*[A-Za-z]{0})(?:[0-9]+)
                |
                (?# Look ahead, is it alphanumeric? Take them all.)
                (?=[0-9]*[A-Za-z-]+[0-9A-Za-z-]*)(?:[0-9A-Za-z-]+)
            ){1}
            (?:
                (?# Look ahead, is it just zero? Then claim a zero.)
                \.(?=[0]{1}[0-9A-Za-z-]{0})(?:[0]{1})
                |
                (?# Look ahead, is it pure numeric? Then claim the digits.)
                \.(?=[1-9]{1}[0-9]*[A-Za-z]{0})(?:[0-9]+)
                |
                (?# Look ahead, is it alphanumeric? Take them all.)
                \.(?=[0-9]*[A-Za-z-]+[0-9A-Za-z-]*)(?:[0-9A-Za-z-]+)
            )*
        ){1}
    ){0,1}
    (?:
        (?# Build meta tag is preceded by a plus symbol and followed by one or more dot seperated fields)
        \+
        (?<Meta>(?:[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))
    ){0,1}
)
$

测试数据：

0.0.4
1.2.3
10.20.30
1.1.2-prerelease+meta
1.1.2+meta
1.1.2+meta-valid
1.0.0-alpha
1.0.0-beta
1.0.0-alpha.beta
1.0.0-alpha.beta.1
1.0.0-alpha.1
1.0.0-alpha0.valid
1.0.0-alpha.0valid
1.0.0-alpha-a.b-c-somethinglong+build.1-aef.1-its-okay
1.0.0-rc.1+build.1
2.0.0-rc.1+build.123
1.2.3-beta
10.2.3-DEV-SNAPSHOT
1.2.3-SNAPSHOT-123
1.0.0
2.0.0
1.1.7
2.0.0+build.1848
2.0.1-alpha.1227
1.0.0-alpha+beta
1.2.3----RC-SNAPSHOT.12.9.1--.12+788
1.2.3----R-S.12.9.1--.12+meta
1.2.3----RC-SNAPSHOT.12.9.1--.12
1.0.0+0.build.1-rc.10000aaa-kk-0.1
99999999999999999999999.999999999999999999.99999999999999999
Begin Invalid

1
1.2
1.2.3-0123
1.2.3-0123.0123
1.1.2+.123
+invalid
-invalid
-invalid+invalid
-invalid.01
alpha
alpha.beta
alpha.beta.1
alpha.1
alpha+beta
alpha_beta
alpha.
alpha..
beta\
1.0.0-alpha_beta
-alpha.
1.0.0-alpha..
1.0.0-alpha..1
1.0.0-alpha...1
1.0.0-alpha....1
1.0.0-alpha.....1
1.0.0-alpha......1
1.0.0-alpha.......1
01.1.1
1.01.1
1.1.01
1.2
1.2.3.DEV
1.2-SNAPSHOT
1.2.31.2.3----RC-SNAPSHOT.12.09.1--..12+788
1.2-RC-SNAPSHOT
-1.0.3-gamma+b7718
+justmeta
9.8.7+meta+meta
9.8.7-whatever+meta+meta
99999999999999999999999.999999999999999999.99999999999999999----RC-SNAPSHOT.12.09.1--------------------------------..12

Answer 1

根据@WiktorStribiżew的建议，我修改了命名捕获组并删除了冗余量词。它现在正在regex101.com（v3）处理除了golang之外的所有事情。看起来我们只需要建议golang用户抓住go-pcre library。

如果我发现任何更有效/更正确的方法，我会更新这篇文章。

^(?<VersionTripple>(?<Major>0|[1-9][0-9]*)\.(?<Minor>0|[1-9][0-9]*)\.(?<Patch>0|[1-9][0-9]*))(?<Tags>(?:\-(?<Prerelease>(?:(?=[0]{1}[0-9A-Za-z-]{0})(?:[0]{1})|(?=[1-9]{1}[0-9]*[A-Za-z]{0})(?:[0-9]+)|(?=[0-9]*[A-Za-z-]+[0-9A-Za-z-]*)(?:[0-9A-Za-z-]+)){1}(?:\.(?=[0]{1}[0-9A-Za-z-]{0})(?:[0]{1})|\.(?=[1-9]{1}[0-9]*[A-Za-z]{0})(?:[0-9]+)|\.(?=[0-9]*[A-Za-z-]+[0-9A-Za-z-]*)(?:[0-9A-Za-z-]+))*)){0,1}(?:\+(?<Meta>(?:[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))){0,1})$

带评论的扩展版本：

^
(?<VersionTripple>
    (?# Version fields are either zero or numeric with no leading zeros.)
    (?<Major>0|[1-9][0-9]*)
    \.
    (?<Minor>0|[1-9][0-9]*)
    \.
    (?<Patch>0|[1-9][0-9]*)
)
(?<Tags>
    (?# Either a prerelease tag or a prerelease tag followed by a build meta tag.)
    (?:
        (?# Prelease tags are preceded by a single dash and have one or more dot seperated identifiers.)
        \-
        (?<Prerelease>
            (?:
                (?# Look ahead, is it just zero? Then claim a zero.)
                (?=[0]{1}[0-9A-Za-z-]{0})(?:[0]{1})
                |
                (?# Look ahead, is it pure numeric? Then claim the digits.)
                (?=[1-9]{1}[0-9]*[A-Za-z]{0})(?:[0-9]+)
                |
                (?# Look ahead, is it alphanumeric? Take them all.)
                (?=[0-9]*[A-Za-z-]+[0-9A-Za-z-]*)(?:[0-9A-Za-z-]+)
            ){1}
            (?:
                (?# Look ahead, is it just zero? Then claim a zero.)
                \.(?=[0]{1}[0-9A-Za-z-]{0})(?:[0]{1})
                |
                (?# Look ahead, is it pure numeric? Then claim the digits.)
                \.(?=[1-9]{1}[0-9]*[A-Za-z]{0})(?:[0-9]+)
                |
                (?# Look ahead, is it alphanumeric? Take them all.)
                \.(?=[0-9]*[A-Za-z-]+[0-9A-Za-z-]*)(?:[0-9A-Za-z-]+)
            )*
        )
    ){0,1}
    (?:
        (?# Build meta tag is preceded by a plus symbol and followed by one or more dot seperated fields)
        \+
        (?<Meta>(?:[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))
    ){0,1}
)
$

semver正则表达式比这个更便携或额外的覆盖范围？

1 个答案: